fix(tx): list transactions with account "*" so labelled rows show

listtransactions was called with the default "" account, which
returns only rows in the unnamed account. Transactions tied to a
labelled address were left out of the History tab entirely.

- All three listtransactions call sites now pass "*", which spans
  every account, so labelled-address rows appear alongside the rest.
- With "*" the daemon also emits "move" accounting rows that have no
  txid, address or vout. Those are not wallet transactions, so they
  are skipped and never become blank History rows. No real
  transaction row is dropped by this filter.

Tests cover that a "move" row is skipped while a labelled receive row
is kept, and that the transparent collectors now page with "*".

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/rpc/rpc_client.cpp

@@ -684,7 +684,7 @@ void RPCClient::z_getNewAddress(Callback cb, ErrorCallback err)
 
 void RPCClient::listTransactions(int count, Callback cb, ErrorCallback err)
 {
-    doRPC("listtransactions", {"", count}, cb, err);
+    doRPC("listtransactions", {"*", count}, cb, err);
 }
 
 void RPCClient::z_viewTransaction(const std::string& txid, Callback cb, ErrorCallback err)